Per-Agent Inbox UI (EW-665)

Web-app surfaces consuming the three backend epics: settings/integrations/emails, settings/integrations/channels, settings/notifications matrix, and per-Agent inbox tab + composer.

• spec.md — feature specification
• plan.md — implementation plan
• tasks.md — task breakdown

Sibling specs in the notifications-v2 umbrella: email-providers, notification-channels, event-subscriptions.